What is the term for the angle measuring clearance between the tooth back and the workpiece?

The term for the angle measuring clearance between the tooth back and the workpiece is known as the Tooth Back Clearance Angle. This angle is crucial in cutting tools, as it allows for the proper clearance necessary to avoid interference between the cutter and the workpiece material during machining operations. A well-designed Tooth Back Clearance Angle ensures that the cutting edges can effectively remove material without causing excessive wear to the tool or generating unnecessary heat due to friction.

Understanding this concept is important in both tool design and machining practices. If the clearance angle is too small, it can lead to rubbing and heat buildup, which may affect tool life and part quality. Conversely, an excessively large clearance angle may reduce cutting efficiency.